Linked from

The 20 pages that link to Gaia, each with the reason it gives.

• AstrometryBroader topic: Its repeated all-sky measurements produced an unprecedented astrometric catalog.

• ParallaxBroader topic: Its astrometric measurements use parallax to map the Milky Way.

• Cepheid variableRelated: Its parallaxes refine the nearby Cepheid calibration that underpins extragalactic distances.

• Proper motionBroader topic: Gaia's repeated all-sky astrometry has produced proper motions for over a billion stars.

• Interstellar extinctionBroader topic: Its stellar data support mapping dust extinction across the Milky Way.

• Stellar parallaxBroader topic: Its repeated all-sky observations have measured parallaxes for more than a billion stars.

• Galactic archaeologyRelated: Its precise astrometry enabled large-scale searches for coherent stellar debris.

• ParsecRelated: Its parallax catalog supplies distances for vast numbers of stars.

• Stellar kinematicsRelated: Its catalog provides precise astrometry for millions of Milky Way stars.

• Free-floating planetRelated: Its astrometry can help identify nearby faint companions and unbound populations.

• PleiadesRelated: Its astrometry refines the Pleiades’ membership, structure, and distance.

• International Celestial Reference SystemRelated: Gaia's optical astrometry realizes the celestial system in a dense catalog of stars.

• Classical Cepheid variableRelated: Its parallax measurements help calibrate Cepheid luminosities and refine the distance scale.

• Orion ArmRelated: Its stellar measurements refine maps of the Sun’s neighborhood and Galactic structure.

• Coalsack NebulaRelated: Distances to stars around and behind the cloud help constrain its location and structure.

• Andromeda–Milky Way collisionRelated: Astrometric data from Gaia help refine the motions of Local Group galaxies and their companions.

• Galactic astronomyBroader topic: Its astrometric catalog maps the positions and motions of over a billion Milky Way stars.

• Lissajous orbitBroader topic: Gaia used a Lissajous orbit around Sun–Earth L2 during its science mission.

• Scutum–Centaurus ArmRelated: Its stellar measurements improve maps of the Milky Way’s disk structure.

• Satellite galaxies of the Milky WayRelated: Its measurements reveal satellite orbits and identify stars stripped into streams.